#Android color picker update
In our Activity, we will initialize our 4 views and 3 integers or bytes for r, g, b values, then we need to set our listener to every SeekBar so when user change the SeekBar value we can get the new values and update our ImageView with the new color. 3 SeekBars one for every value (R, G, B). In the xml file we need the following views - ImageView to show current color. We will create RGB color picker, before we start you should know that to create a color we need 3 values R value for Red, G value for Green and B value for Blue and each one is between 0 to 255 so we can represent each color value as a byte or integer. We will create it on Activity and you can use it in activity or create it as a dialog.
So I decided to create my color picker and in this article, we will create a simple one and you can improve it as you need for your project. Later I can easily support many picker types. Later I can easily support some features like saturation, alpha, lightness …etc. The dialog should start with the current user values as default value. The dialog buttons or views should be changed in the run time depend on the current user choose. The dialog background color should be dynamic depending on the current user choose. One of the problems I faced is to make a custom Color Picker dialog with a custom needs for example.
#Android color picker how to
I will describe in another article how to support dynamic UI color in the runtime like for example Ask.fm let the user choose between a number of themes, or like my app to let the user customize every view.
#Android color picker android
_dialog.DismissEvent += (ssender, args) =>ĮlementController?.SetValueFromRenderer(VisualElement.IsFocusedProperty, false) Ī btnOk = _dialog.GetButton((int)DialogInterface.ButtonPositive) ītnOk.SetTextColor() Ī btnCancel = _dialog.GetButton((int)DialogInterface.ButtonNegative) ītnCancel.SetTextColor(, I am Amr Hesham and I am a software engineer who interested in android development and compiler design, In the last year, I created a simple timer app but I want to make the user control all the UI color, so I can make a dynamic UI colors support, so, for example, the user can change background, text, action bar …etc colors in the runtime and every user should have his timer with own theme. It is also possible for the Content of the Page to be changed when Focus is changed. If ( > 0 & Element.SelectedIndex >= 0)Ĭontrol.Text = model.Items In this case, the Element & Control will no longer exist. It is possible for the Content of the Page to be changed on SelectedIndexChanged. It is possible for the Content of the Page to be changed when Focus is changed.īuilder.SetPositiveButton("Ok", (s, a) =>ĮlementController.SetValueFromRenderer(Picker.SelectedIndexProperty, picker.Value) Var builder = new AlertDialog.Builder(Context) īuilder.SetNegativeButton("Cancel", (s, a) =>ĮlementController.SetValueFromRenderer(VisualElement.IsFocusedProperty, false) Var layout = new LinearLayout(Context) ĮlementController.SetValueFromRenderer(VisualElement.IsFocusedProperty, true) Picker.DescendantFocusability = DescendantFocusability.BlockDescendants
Private void Control_Click(object sender, EventArgs e) Protected override void Dispose(bool disposing) If (e.NewElement = null || e.OldElement != null) Protected override void OnElementChanged(ElementChangedEventArgs e) Private IElementController ElementController => Element as IElementController Public MyPickerRenderer (Context context ) : base(context) You could do this with custom renderer, refer, i complete the solution.
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